whichofthe following does not describe semiconductors Their band gaps are betwee
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Question
whichofthe following does not describe semiconductorsTheir band gaps are between metals and insulators
Doped p type and n type semi conductors are less conducive than semi conductors materials that aren’t doped
They can be single element or compound
They have an average of 4 valence electrons
whichofthe following does not describe semiconductors
Their band gaps are between metals and insulators
Doped p type and n type semi conductors are less conducive than semi conductors materials that aren’t doped
They can be single element or compound
They have an average of 4 valence electrons
Their band gaps are between metals and insulators
Doped p type and n type semi conductors are less conducive than semi conductors materials that aren’t doped
They can be single element or compound
They have an average of 4 valence electrons
Explanation / Answer
Option third is wrong as Doping is done to alter the electrical properties of a semicunductor by adding foreign elements. It can either decrease or increase the conductivity depending upon the type of doping done. so it's not true that the doped semiconductor has less conducivity than the undoped one.
The conductivity of silicon is increased by adding a small amount of pentavalent (antimony, phosphorus, or arsenic) or trivalent (boron, gallium, indium) atoms (~ part in 108).
Impurity atoms with 5 valence electrons produce n-type semiconductors by contributing extra electrons.
Impurity atoms with 3 valence electrons produce p-type semiconductors by producing a "hole" or electron deficiency.
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